I'm in the process of recommending an inverted siphon to cross under a row of pipelines. My pipe(s) length will be approximately 350' and the elevation difference between the inlet and outlet could be as much as 2.65 feet. I'm using an HDPE pipe with a mannings n of around 0.010. I need to convey about 83 cfs from on side of the pipeline row to the other.
What would be an ideal velocity for this type of siphon? I've been told that 6fps is a good number to use, but I'd like a 'second opinion' (or more).
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